Method for preparing modified natural wood material and application thereof in sewage treatment

Abstract

The present invention belongs to the field of sewage treatment, and relates to a method for preparing a modified natural wood material and an application thereof in sewage treatment. The method for preparing the modified natural wood material includes the following steps: S 1 . placing wood into a lignin removal solution, after a heating reaction, washing, impregnating, and lyophilizing the wood to obtain removed lignin wood; S 2 . blending TiO 2 with NaBH 4 , performing low-heat reduction treatment, and then washing and drying to obtain reduced black titanium; S 3 . dispersing the reduced black titanium ultrasonically in a solvent, then coating dropwise on the removed lignin wood, and drying to obtain a modified natural wood material. The modified natural wood material prepared by the present invention has high disinfection and sterilization performance, and has the ability to remove bio-risk components.

1 . A method for preparing a modified natural wood material, comprising the following steps:
 S 1 . placing wood into a lignin removal solution, after a heating reaction, washing, impregnating, and lyophilizing the wood to obtain removed lignin wood;   blending TiO 2  with NaBH 4 , performing low-heat reduction treatment, and then washing and drying to obtain reduced black titanium;   S 2 . dispersing the reduced black titanium ultrasonically in a solvent, then coating on the removed lignin wood, and drying to obtain a modified natural wood material;   wherein,   the natural wood material is American lightwood;   the reduced black titanium has a bandgap of 2.10-2.20 eV.   
     
     
         2 . The method for preparing the modified natural wood material according to  claim 1 ,
 wherein in step S 1 , the method for preparing the lignin removal solution comprises the following steps: dissolving acetate in water, adjusting pH, and then adding chlorate.   
     
     
         3 . The method for preparing the modified natural wood material according to  claim 2 , wherein a molar ratio of acetate to chlorate is (2.5-3):1. 
     
     
         4 . The method for preparing the modified natural wood material according to  claim 2 , wherein the pH is 4.4-4.8. 
     
     
         5 . The method for preparing the modified natural wood material according to  claim 1 , wherein in step S 1 , the heating reaction has a temperature of 100-120° C. and time of 8-10 h. 
     
     
         6 . The method for preparing the modified natural wood material according to  claim 1 , wherein in step S 1 , a molar ratio of TiO 2  to NaBH 4  is (1-1.5):1. 
     
     
         7 . The method for preparing the modified natural wood material according to  claim 1 , wherein in step S 1 , the method for blending TiO 2  with NaBH 4  is ball-milling mixing. 
     
     
         8 . The method for preparing the modified natural wood material according to  claim 1 , wherein in step S 1 , the low-heat reduction treatment is performed under an inert gas atmosphere at a temperature of 300-350° C. for 1-1.5 h. 
     
     
         9 . The method for preparing the modified natural wood material according to  claim 1 , wherein in step S 2 , ultrasonic dispersion has time of 20-40 min. 
     
     
         10 . An application of the modified natural wood material of  claim 1  in sewage treatment.